How to read a large file line by line?
I want to read a file line by line, but without completely loading it in memory.
My file is too large to open in memory, and if try to do so I always get out of memory errors.
The file size is 1 GB.
Abdullah R.
answered 01/18/26
PHP Full Stack E-Commerce Web Developer
Make sure not to use this function in php file_get_contents() instead use fopen()
Here is an example on how to read a large file in PHP
$handle = fopen("bigfile.txt" , "r" );
if ($handle) {
while (($line = fgets($handle)) !== false ) {
}
fclose($handle);
} else {
echo "Error opening file." ;
}
I hope this help
Still looking for help? Get the right answer, fast.
OR
Find an Online Tutor Now
Choose an expert and meet online.
No packages or subscriptions, pay only for the time you need.
¢
€
£
¥
‰
µ
·
•
§
¶
ß
‹
›
«
»
<
>
≤
≥
–
—
¯
‾
¤
¦
¨
¡
¿
ˆ
˜
°
−
±
÷
⁄
×
ƒ
∫
∑
∞
√
∼
≅
≈
≠
≡
∈
∉
∋
∏
∧
∨
¬
∩
∪
∂
∀
∃
∅
∇
∗
∝
∠
´
¸
ª
º
†
‡
À
Á
Â
Ã
Ä
Å
Æ
Ç
È
É
Ê
Ë
Ì
Í
Î
Ï
Ð
Ñ
Ò
Ó
Ô
Õ
Ö
Ø
Œ
Š
Ù
Ú
Û
Ü
Ý
Ÿ
Þ
à
á
â
ã
ä
å
æ
ç
è
é
ê
ë
ì
í
î
ï
ð
ñ
ò
ó
ô
õ
ö
ø
œ
š
ù
ú
û
ü
ý
þ
ÿ
Α
Β
Γ
Δ
Ε
Ζ
Η
Θ
Ι
Κ
Λ
Μ
Ν
Ξ
Ο
Π
Ρ
Σ
Τ
Υ
Φ
Χ
Ψ
Ω
α
β
γ
δ
ε
ζ
η
θ
ι
κ
λ
μ
ν
ξ
ο
π
ρ
ς
σ
τ
υ
φ
χ
ψ
ω
ℵ
ϖ
ℜ
ϒ
℘
ℑ
←
↑
→
↓
↔
↵
⇐
⇑
⇒
⇓
⇔
∴
⊂
⊃
⊄
⊆
⊇
⊕
⊗
⊥
⋅
⌈
⌉
⌊
⌋
〈
〉
◊